CN117359381A

CN117359381A - Punching machine tool

Info

Publication number: CN117359381A
Application number: CN202311571309.1A
Authority: CN
Inventors: 张群坡; 张开锋; 方昌水; 韦飘城
Original assignee: Ningbo Cofar Hose & Fittings Co ltd
Current assignee: Ningbo Cofar Hose & Fittings Co ltd
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-01-09

Abstract

The utility model relates to a machine tool punches, which comprises a base, be equipped with fixture and drill floor on the base, sliding connection has the protection casing that is used for preventing that the piece from splashing on the base, fixedly connected with drive rack on the drill floor, rotate on the base be connected with drive rack engagement's first drive gear, the coaxial fixedly connected with level of first drive gear sets up first bevel gear, rotate on the base be connected with the second bevel gear of vertical setting, second bevel gear and first bevel gear meshing, the coaxial fixedly connected with second drive gear of second bevel gear, fixedly connected with drive rack on the protection casing, drive rack and second drive gear meshing, when the drill floor slides to the direction that is close to fixture, the protection casing slides to shade fixture's direction. The application has the effect of automatic lock protection casing when drilling.

Description

Punching machine tool

Technical Field

The application relates to the field of workpiece punching technical equipment, in particular to a punching machine tool.

Background

In the current industrial production, the punching of a workpiece is a common processing technology. The equipment that punches is various, can select different drilling equipment according to different processing environment and precision requirement generally, in partial work piece processing, in order to guarantee the precision of processing, can use the lathe of punching to punch.

The punching machine tool is a punching device commonly used in industrial production, comprises a clamping mechanism for clamping and fixing a workpiece and a drill bit for drilling, and is provided with a motor for driving the drill bit or the clamping mechanism to rotate, and the drill bit is used for drilling holes in the workpiece. In the drilling process, the workpiece and the drill bit can be quickly heated due to high-speed friction, and in order to maintain the structural strength of the drill bit in the machining process, a cooling device is usually arranged on the punching machine to cool. Machining process red produces some fine machining chips, and in order to prevent the chips from splashing to injure workers, punching machines are usually equipped with switchable shields.

Aiming at the related technology, the protection cover needs to be opened before drilling, and needs to be closed during drilling, so that the operation procedure and the workload are increased, and the drilling efficiency is affected.

Disclosure of Invention

In order to improve punching efficiency, the application provides a punching machine tool.

The application provides a punching machine tool, adopts following technical scheme:

the utility model provides a lathe punches, includes the base, rotates on the base to be connected with the fixture that is used for fixed work piece and is equipped with the rotating electrical machines that is used for driving the fixture pivoted, horizontal sliding connection has the drill floor on the base, fixedly connected with is used for the drill bit of drilling on the drill floor, drill bit and the coaxial setting of fixture, sliding connection has the protection casing that is used for preventing the piece and splashes on the base, fixedly connected with drive rack on the drill floor, the length direction of drive rack is parallel with the slip direction of drill floor, rotate on the base be connected with the first drive gear of drive rack meshing, the first bevel gear of the coaxial fixedly connected with level setting of first drive gear, rotate on the base to be connected with the second bevel gear of vertical setting, the second bevel gear meshes with first bevel gear, the coaxial fixedly connected with second drive gear of second bevel gear, fixedly connected with is used for driving the gliding drive rack of protection casing on the protection casing, drive rack meshes with second drive gear, when the drill floor slides to the direction that is close to fixture, the protection casing slides to the direction of shade fixture.

Through adopting above-mentioned technical scheme, sliding connection has the protection casing that is used for preventing that the piece from splashing on the base, and the protection casing can slide to shade fixture's position and prevent that the piece from splashing, protection operating personnel's safety. When the drill floor slides towards the direction close to the clamping mechanism, the transmission rack drives the first transmission gear to rotate, then drives the first bevel gear to rotate in the same direction, rotates along with the second bevel gear meshed with the first bevel gear, and drives the second transmission gear to rotate, and the second transmission gear drives the driving rack to move so as to drive the protective cover to slide towards the direction of the shade clamping mechanism. When drilling, the protection casing can automatic sliding lock, has reduced operation and work load, helps improving punching efficiency.

Optionally, the bearing groove has been seted up to the base, is equipped with the layer board that is used for bearing protection casing in the bearing groove, is connected with the elastic component that is used for the layer board to reset between the diapire in layer board and bearing groove.

Through adopting above-mentioned technical scheme, when the rig floor slides to the direction that is close to fixture, the protection casing slides to shade fixture's direction, when drill bit and work piece just contacted, because the group drill bit need continue to advance one end distance in the direction that is close to fixture, the protection casing is not the complete lock of this moment, has weakened the protective capacities of protection casing, sets up the layer board, layer board and protection casing butt, and the cooperation is with drilling work position complete shade, and the layer board can also remove along with the slip of protection casing, keeps the butt state between layer board and the protection casing, helps improving the protective capacities.

Optionally, a sealing strip for enhancing the sealing performance between the supporting plate and the protective cover is arranged at one end of the supporting plate, which is close to the protective cover.

Through adopting above-mentioned technical scheme, set up the sealing strip, can strengthen sealing performance between layer board and the protection casing, prevent that the coolant liquid from flowing out from the gap between layer board and the protection casing.

Optionally, be equipped with the refrigeration water tank that is used for storing the cooling water and cools down the cooling water on the base, be equipped with the shower nozzle that is used for spraying the cooling water on the rig floor, be connected with the water supply pipe who is used for supplying with the cooling water for the shower nozzle between shower nozzle and the refrigeration water tank.

By adopting the technical scheme, in the drilling process, the workpiece and the drill bit are rapidly heated due to high-speed friction between the workpiece and the drill bit, the structural strength of the drill bit is reduced due to the excessively high temperature, and the machining precision is reduced. The cooling water tank is arranged, cooling water is arranged on the cooling water tank, cooling water is supplied to the spray head through the water supply pipeline, the spray head sprays cooling water to the workpiece and the drill bit, the temperature of the workpiece and the drill bit in processing is reduced, and the processing precision is improved.

Optionally, be equipped with the valve that is used for regulating and controlling the water supply ability on the water supply pipe, be equipped with the regulating gear who is used for regulating and controlling the valve degree of opening and shutting on the valve, offered the temperature sensing chamber in the rig floor, sliding connection has the piston in the temperature sensing chamber, fills between the diapire of piston and temperature sensing chamber and is used for driving the gliding mercury of piston along with temperature variation, and the one end fixedly connected with adjusting rack of temperature sensing chamber diapire is kept away from to the piston, adjusting rack and regulating gear meshing, and when the temperature of rig floor risees, adjusting rack drive regulating gear rotates to the direction that increases the valve degree of opening and shutting.

By adopting the technical scheme, under the states of different processing intensities, different workpiece materials, different room temperature, processing time and the like, the heating conditions of the workpiece and the drill bit are different, and the cooling capacity of cooling water needs to be adjusted according to different heating conditions. The temperature conduction of drill bit to the drill floor, the mercury in the temperature sensing chamber can be according to the temperature of drill bit and expend with heat and contract with cold, and when the drill bit temperature risees, mercury intensifies and expands, and drive piston slides to the direction of keeping away from the temperature sensing chamber diapire, drives the regulation rack and syntropy and removes, and the regulation rack drives the regulation gear and rotates to the direction of the degree of opening and shutting of increase valve, increases the degree of opening and shutting of valve, and then reinforcing cooling capacity, and similarly, it can be known that when the drill bit temperature reduces, the degree of opening and shutting of valve reduces, and then weakens cooling capacity. The cooling capacity can be automatically adjusted according to the change of the temperature of the drill bit, and the conditions of insufficient cooling capacity and waste of cooling water are avoided.

Optionally, be equipped with the collection water tank that is used for collecting the cooling water in the base, offered the collection mouth that is used for the cooling water to pass through and enter into in the collection water tank on the base.

Through adopting above-mentioned technical scheme, collect the mouth and can make the cooling water that falls pass through in time. The cooling water is prevented from accumulating on the base, and the cooling water passing through the collecting port can be timely collected by the collecting water tank, so that the cooling water is reused, and waste is reduced.

Optionally, a water return pipeline for recycling cooling water is connected between the collecting water tank and the refrigerating water tank, and a filter screen for filtering impurities is arranged in the water return pipeline.

Through adopting above-mentioned technical scheme, set up the return water pipeline between collecting water tank and refrigeration water tank, can directly retrieve the cooling water who gathers to the interior reuse of refrigeration water tank, reduced operating procedure, the filter screen can filter the impurity in the cooling water, reduces the impurity in the cooling water.

Optionally, a detection control circuit is arranged on the base, and the detection control circuit comprises an induction module, a comparison module and a control module:

the sensing module comprises a thermometer, wherein the thermometer is arranged on the refrigerating water tank and is used for detecting the temperature of cooling water in the refrigerating water tank and outputting a sensing signal;

the comparison module is electrically connected with the induction module and is used for receiving an induction signal of the induction module, when the comparison module receives the induction signal, the voltage value corresponding to the induction signal is compared with a preset voltage value, the preset voltage value corresponds to the highest temperature when the cooling water is normally used, and if the voltage value of the induction signal is larger than the preset voltage value, the comparison module outputs a starting signal;

the control module is electrically connected with the comparison module and is used for receiving a starting signal of the comparison module, outputting a control signal when the control module receives the starting signal, and controlling the refrigeration water tank to start refrigeration.

Through adopting above-mentioned technical scheme, the thermometer of response module detects the temperature of cooling water in the refrigeration water tank and output induction signal, comparison module receives induction signal, comparison module compares the voltage value of received induction signal with predetermineeing the voltage value, predetermineeing the highest temperature when voltage value corresponds the normal use of cooling water, if the voltage value that induction signal corresponds is greater than predetermineeing the voltage value, then output start signal, control module receives start signal, output control signal, control signal control refrigeration water tank starts refrigeration, can be when the cooling water temperature is higher than the highest temperature when normal use, automatic start refrigeration water tank refrigeration cooling.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the base is slidably connected with the protective cover, the protective cover can be switched to be buckled and opened through sliding, under the buckling state, the protective cover is positioned at the position of the shade clamping mechanism, so that the safety of operators can be effectively prevented from splashing, the drill floor slides towards the direction close to the clamping mechanism during punching, the transmission rack drives the first transmission gear to rotate, the first transmission gear drives the first bevel gear to rotate in the same direction, the second bevel gear meshed with the first bevel gear rotates along with the first bevel gear, the second bevel gear drives the second transmission gear to rotate, the second transmission gear drives the driving rack to move so as to drive the protective cover to slide towards the direction of the shade clamping mechanism, the protective cover can automatically slide and buckle during punching, the operation procedures and the workload are reduced, and the punching efficiency is improved;

2. under different operating modes, the heating conditions of work piece and drill bit are different, for example different machining intensity, different work piece materials and different room temperature and process time etc, need the staff to adjust the cooling capacity of cooling water according to the heating condition of difference in a flexible way, the temperature conduction of drill bit is to the drill floor, the mercury in the temperature sensing chamber can expand with heat and contract with cold according to the temperature of drill bit, when the drill bit temperature risees, the mercury intensifies and expands, drive the piston to keeping away from the direction of temperature sensing chamber diapire and slide, adjust rack drive adjusting gear and to the direction rotation of increase valve degree of opening and shutting, increase the degree of opening and shutting of valve, when the drill bit temperature reduces, the valve degree of opening and shutting reduces, can be according to the change of drill bit temperature and automatically regulated cooling capacity, avoid the circumstances that cooling capacity is not enough and cooling water is extravagant.

Drawings

Fig. 1 is a schematic diagram for showing a drill floor in an embodiment of the present application.

Fig. 2 is a schematic diagram of an internal structure for showing a second transmission gear in the embodiment of the present application.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Fig. 5 is a schematic overall structure of an embodiment of the application.

Fig. 6 is an enlarged schematic view of a portion C in fig. 1.

Fig. 7 is a schematic view showing an internal structure of the collecting tank in the embodiment of the present application.

Fig. 8 is an enlarged schematic view of a portion D in fig. 7.

Fig. 9 is an enlarged schematic view of the portion E in fig. 7.

Fig. 10 is a schematic diagram for showing the control module of the sensing module and the comparison module box in the embodiment of the application.

Reference numerals illustrate: 1. a base; 11. a first transmission gear; 111. a first bevel gear; 12. a second bevel gear; 121. a second transmission gear; 13. a support groove; 131. a supporting plate; 132. an elastic member; 133. a sealing strip; 14. a collection port; 2. a clamping mechanism; 3. a rotating motor; 4. a drill floor; 41. a drill bit; 42. a drive rack; 43. a spray head; 44. a water supply pipe; 45. a valve; 451. an adjusting gear; 46. a temperature sensing cavity; 461. a piston; 462. mercury; 47. adjusting the rack; 5. a protective cover; 51. a drive rack; 6. a refrigeration water tank; 7. a collecting water tank; 71. a water return pipe; 711. a filter screen; 81. an induction module; 811. a thermometer; 82. a comparison module; 83. and a control module.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a punching machine tool.

Referring to fig. 1 and 2, a punching machine tool comprises a base 1, wherein a clamping mechanism 2 and a rotating motor 3 are installed on the base 1, the clamping mechanism 2 adopts a three-jaw chuck, the clamping mechanism 2 is rotatably connected to the base 1, a rotating axis is horizontally arranged, and an output shaft of the rotating motor 3 is fixedly connected with the clamping mechanism 2 coaxially and is used for driving the clamping mechanism 2 to rotate. The base 1 is horizontally and slidably connected with a drill floor 4, and a drill bit 41 coaxially arranged with the clamping mechanism 2 is fixedly connected with the drill floor 4. The base 1 is connected with the protective cover 5 in a sliding manner, the protective cover 5 is integrally arc-shaped, the clamping mechanism 2 can be covered, the protective function is further provided, and the buckling and opening states of the protective cover can be switched through sliding the protective cover 5.

Referring to fig. 2 and 3, a transmission rack 42 is fixedly connected to the drill floor 4, the length direction of the transmission rack 42 is parallel to the sliding direction of the drill floor 4, the transmission rack 42 is driven to move in the same direction when the drill floor 4 slides, a first transmission gear 11 meshed with the transmission rack 42 is rotationally connected to the base 1, the moving transmission rack 42 drives the first transmission gear 11 to rotate, a first bevel gear 111 arranged horizontally is coaxially and fixedly connected to the first transmission gear 11, the first bevel gear 111 and the first transmission gear 11 synchronously rotate, a second bevel gear 12 arranged vertically is rotationally connected to the base 1, the second bevel gear 12 is meshed with the first bevel gear 111, a second transmission gear 121 is coaxially and fixedly connected to the second bevel gear 12, and the second transmission gear 121 and the second bevel gear synchronously rotate. The protective cover 5 is fixedly connected with a driving rack 51 for driving the protective cover 5 to slide, the driving rack 51 is meshed with a second transmission gear 121, and the second transmission gear 121 drives the driving rack 51 to move so as to drive the protective cover 5 to slide. When the drill floor 4 slides in a direction approaching the holding mechanism 2, the protection cover 5 slides in a direction of the mask holding mechanism 2. The automatic buckling of the protective cover 5 in the drilling process is realized, the operation procedures and the workload are reduced, and the punching efficiency is improved.

Referring to fig. 1, 2 and 4, when the drill floor 4 slides in a direction approaching the clamping mechanism 2, the protective cover 5 slides in a direction approaching the mask clamping mechanism 2, and when the drill bit 41 is just contacted with a workpiece, because the drill bit 41 needs to continue to feed a distance to one end in the direction approaching the clamping mechanism 2 to drill holes, at this time, the protective cover 5 is not completely buckled, so that space is provided for sliding of the subsequent drill floor 4, and the protective effect of the protective cover 5 is affected. The base 1 is provided with a bearing groove 13, a supporting plate 131 is arranged in the bearing groove 13, the supporting plate 131 can be abutted with the protective cover 5, and the drilling work position is completely covered by matching. An elastic piece 132 is connected between the supporting plate 131 and the bottom wall of the supporting groove 13, the elastic piece 132 adopts a spring, the supporting plate 131 moves along with the sliding of the protective cover 5, and the elastic piece 132 can keep the abutting state between the supporting plate 131 and the protective cover 5, so that the protective effect is improved.

Referring to fig. 1 and 5, the sprayed cooling is followed by a possibility of flowing out from a gap between the supporting plate 131 and the protective cover 5, and a sealing strip 133 is arranged at one end of the supporting plate 131 close to the protective cover 5, so that the sealing performance between the supporting plate 131 and the protective cover 5 is enhanced, and the cooling liquid is prevented from flowing out from the gap between the supporting plate 131 and the protective cover 5.

Referring to fig. 1 and 6, during drilling, high-speed friction between the workpiece and the drill 41 causes rapid temperature rise of the workpiece and the drill 41, and excessive temperature may cause structural strength of the drill 41 to be reduced, thereby affecting machining accuracy. The base 1 is provided with a refrigeration water tank 6, the refrigeration water tank 6 is provided with cooling water, and the refrigeration water tank 6 cools the cooling water. The drill floor 4 is provided with the spray head 43, a water supply pipeline 44 is connected between the spray head 43 and the refrigerating water tank 6, cooling water is supplied to the spray head 43 through the water supply pipeline 44, the spray head 43 sprays the cooling water to the workpiece and the drill 41, the temperature of the workpiece and the drill 41 during processing is reduced, and the processing precision is improved.

Referring to fig. 7 and 8, in the states of different machining strengths, different workpiece materials, different room temperature and machining time, etc., the heating conditions of the workpiece and the drill 41 are different, and the cooling capacity of the cooling water needs to be adjusted according to the different heating conditions, so that a certain amount of labor is required. The temperature sensing cavity 46 is arranged in the drill floor 4, the piston 461 is connected in the temperature sensing cavity 46 in a sliding mode, mercury 462 is filled between the piston 461 and the bottom wall of the temperature sensing cavity 46, the temperature of the drill bit 41 is conducted to the drill floor 4, the mercury 462 in the temperature sensing cavity 46 can expand with heat and contract with cold according to the temperature of the drill bit 41, and when the temperature of the drill bit 41 rises, the mercury 462 rises in temperature and expands to drive the piston 461 to slide in the direction away from the bottom wall of the temperature sensing cavity 46. One end of the piston 461 away from the bottom wall of the temperature sensing cavity 46 is fixedly connected with an adjusting rack 47, the piston 461 drives the adjusting rack 47 to move in the same direction, a valve 45 for regulating and controlling water supply capacity is arranged on the water supply pipeline 44, an adjusting gear 451 for regulating and controlling the opening and closing degree of the valve 45 is arranged on the valve 45, the adjusting rack 47 is meshed with the adjusting gear 451, the adjusting rack 47 drives the adjusting gear 451 to rotate in the direction of increasing the opening and closing degree of the valve 45, the opening and closing degree of the valve 45 is increased, and then cooling capacity is enhanced. Similarly, as the temperature of the bit 41 decreases, the degree of opening and closing of the valve 45 decreases, thereby reducing the cooling capacity. The cooling capacity can be automatically adjusted according to the change of the temperature of the drill bit 41, and the situations of insufficient cooling capacity and waste of cooling water can be avoided.

Referring to fig. 1 and 9, a collecting water tank 7 is installed in a base 1, and a collecting port 14 is formed in the base 1, wherein the collecting port 14 can enable falling cooling water to pass through timely. The cooling water is prevented from accumulating on the base 1, and the cooling water passing through the collecting port 14 can be timely collected by the collecting water tank 7 so as to be reused, and waste is reduced.

Referring to fig. 7 and 9, a return pipe 71 is provided between the collection tank 7 and the refrigeration tank 6, and a filter screen 711 for filtering foreign substances is provided in the return pipe 71. The collected cooling water can be directly recycled into the refrigerating water tank 6, so that the operation steps are reduced, the filter screen 711 can filter impurities in the cooling water, and the impurities in the cooling water are reduced.

Referring to fig. 5 and 9, a detection circuit is provided on the base 1, and the detection circuit includes an induction module 81, a comparison module 82, and a control module 83:

the sensing module 81 comprises a thermometer 811, wherein the thermometer 811 is arranged on the refrigeration water tank 6 and is used for detecting the temperature of cooling water in the refrigeration water tank 6 and outputting a sensing signal;

a comparison module 82 comprising:

a comparator T, a positive input terminal of which is electrically connected to an output terminal of the thermometer 811;

the base electrode of the triode Q is electrically connected with the output end of the comparator T;

the resistor R1, one end of the resistor R1 is electrically connected with the collector electrode of the triode Q, and the other end of the resistor R1 is electrically connected with the power supply VCC;

an electromagnetic coil KA1 of the relay, wherein one end of the electromagnetic coil KA1 of the relay is electrically connected with an emitter of the triode Q;

one end of the resistor R2 is electrically connected with one end of the electromagnetic coil KA1 of the relay, which is far away from the triode Q, and the other end of the resistor R2 is grounded;

the control module 83 includes:

one end of the normally open switch KA1-1 of the relay is electrically connected between the electromagnetic coil KA1 and the resistor R2 of the relay;

the refrigerating water tank 6, one end of the refrigerating water tank 6 is electrically connected with one end of the normally open switch KA1-1 of the relay, which is far away from the resistor R2;

and one end of the resistor R3 is electrically connected with one end of the refrigeration water tank 6, which is far away from the normally open switch KA1-1 of the relay, and the other end of the resistor R3 is grounded.

Referring to fig. 5 and 9, the thermometer 811 of the sensing module 81 detects the temperature of the cooling water in the cooling water tank 6 and outputs a sensing signal, the comparing module 82 receives the sensing signal, the comparing module 82 compares the voltage value of the received sensing signal with a preset voltage value, the preset voltage value corresponds to the highest temperature of the cooling water when the cooling water is used normally, if the voltage value corresponding to the sensing signal is greater than the preset voltage value, a start signal is output, the control module 83 receives the start signal, outputs a control signal, and the control signal controls the cooling water tank 6 to start cooling, so that the cooling water tank 6 can be automatically started to cool when the temperature of the cooling water is higher than the highest temperature of the cooling water when the cooling water is used normally.

The implementation principle of the punching machine tool in the embodiment of the application is as follows: when punching, the workpiece is fixed on the clamping mechanism 2, the rotating motor 3 drives the clamping mechanism 2 to rotate at a high speed, and the drill floor 4 slides towards the direction approaching the clamping mechanism 2. The transmission rack 42 moves along with the drill floor 4 in the same direction, the moving transmission rack 42 drives the first transmission gear 11 to rotate, the first bevel gear 111 which is coaxially and fixedly connected with the first transmission gear 11 rotates along with the first transmission gear, the first bevel gear 111 drives the second bevel gear 12 to rotate, the second transmission gear 121 which is coaxially and fixedly connected with the second bevel gear 12 rotates along with the second bevel gear, and the second transmission gear 121 drives the driving rack 51 to move so as to drive the protective cover 5 to slide towards the mask clamping mechanism 2. The automatic sliding buckling of the protective cover 5 is realized in the drilling process, so that the operation procedures and the workload are reduced, and the punching efficiency is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a lathe punches, includes base (1), rotates on base (1) and is connected with fixture (2) that are used for fixed work piece and is equipped with rotation motor (3) that are used for driving fixture (2) pivoted, and horizontal sliding connection has drill floor (4) on base (1), fixedly connected with drill bit (41) that are used for drilling on drill floor (4), drill bit (41) and fixture (2) coaxial setting, its characterized in that: the utility model discloses a protection casing (5) that sliding connection is used for preventing the piece to splash on base (1), fixedly connected with transmission rack (42) on drilling floor (4), the length direction of transmission rack (42) is parallel with the slip direction of drilling floor (4), rotationally connect with first drive gear (11) with transmission rack (42) meshing on base (1), first bevel gear (111) of first drive gear (11) coaxial fixedly connected with level setting, rotationally connect with second bevel gear (12) of vertical setting on base (1), second bevel gear (12) and first bevel gear (111) meshing, second bevel gear (12) coaxial fixedly connected with second drive gear (121), fixedly connected with is used for driving gliding drive rack (51) of protection casing (5) on protection casing (5), drive rack (51) and second drive gear (121) meshing, when drilling floor (4) are slided to the direction that is close to fixture (2), protection casing (5) slides to the direction of shade fixture (2).

2. A machine tool for punching according to claim 1, characterized in that: the base (1) is provided with a bearing groove (13), a supporting plate (131) for bearing the protective cover (5) is arranged in the bearing groove (13), and an elastic piece (132) for resetting the supporting plate (131) is connected between the supporting plate (131) and the bottom wall of the bearing groove (13).

3. A punching machine according to claim 2, characterized in that: one end of the supporting plate (131) close to the protective cover (5) is provided with a sealing strip (133) for enhancing the sealing performance between the supporting plate (131) and the protective cover (5).

4. A machine tool for punching according to claim 1, characterized in that: the base (1) is provided with a refrigerating water tank (6) for storing cooling water and cooling the cooling water, the drill floor (4) is provided with a spray head (43) for spraying the cooling water, and a water supply pipeline (44) for supplying the cooling water for the spray head (43) is connected between the spray head (43) and the refrigerating water tank (6).

5. A machine tool for punching as in claim 4, wherein: be equipped with on the water supply pipe (44) and be used for regulating and control valve (45) of water supply ability, be equipped with on valve (45) and be used for regulating and control valve (45) the regulating gear (451) of degree of opening and shutting, temperature sensing chamber (46) have been seted up in rig floor (4), sliding connection has piston (461) in temperature sensing chamber (46), it is used for driving gliding mercury (462) of piston (461) along with temperature variation to fill between the diapire of piston (461) and temperature sensing chamber (46), one end fixedly connected with adjusting rack (47) of diapire is kept away from to piston (461), adjusting rack (47) and regulating gear (451) meshing, when the temperature of rig floor (4) risees, adjusting rack (47) drive regulating gear (451) to the direction rotation of the degree of opening and shutting of increase valve (45).

6. A machine tool for punching as in claim 4, wherein: the base (1) is internally provided with a collecting water tank (7) for collecting cooling water, and the base (1) is provided with a collecting port (14) for the cooling water to pass through and enter the collecting water tank (7).

7. A machine tool for punching as in claim 6, wherein: a water return pipeline (71) for recycling cooling water is connected between the collecting water tank (7) and the refrigerating water tank (6), and a filter screen (711) for filtering impurities is arranged in the water return pipeline (71).

8. A machine tool for punching according to claim 1, characterized in that: the base (1) is provided with a detection control circuit, and the detection control circuit comprises an induction module (81), a comparison module (82) and a control module (83):

the induction module (81) comprises a thermometer (811), wherein the thermometer (811) is arranged on the refrigerating water tank (6) and is used for detecting the temperature of cooling water in the refrigerating water tank (6) and outputting an induction signal;

the comparison module (82), the comparison module (82) is connected with the induction module (81) electrically, the comparison module (82) is used for receiving the induction signal of the induction module (81), when the comparison module (82) receives the induction signal, the voltage value corresponding to the induction signal is compared with the preset voltage value, the preset voltage value corresponds to the highest temperature when the cooling water is normally used, and if the voltage value of the induction signal is larger than the preset voltage value, the comparison module (82) outputs a starting signal;

the control module (83), control module (83) are connected with comparison module (82) electricity, and control module (83) are used for receiving the start signal of comparison module (82), and when control module (83) received the start signal, output control signal, control signal control refrigeration water tank (6) start-up refrigeration.